drivers: serial: nrf: Adopting define for UART driver.
drivers: serial: nrf: Adopting define for UART driver.

Change define used to select interrupt driven functions
from CONFIG_UART_INTERRUPT_DRIVEN to CONFIG_UART_0_INTERRUPT_DRIVEN.

Signed-off-by: Jakub Rzeszutko <db01fea5b4491dba4fc272e7096cf665c7b907b9@nordicsemi.no>

galak/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,kraj/zephyr,explora26/zephyr,finikorg/zephyr,Vudentz/zephyr,nashif/zephyr,explora26/zephyr,nashif/zephyr,explora26/zephyr,galak/zephyr,nashif/zephyr,punitvara/zephyr,ldts/zephyr,nashif/zephyr,ldts/zephyr,punitvara/zephyr,explora26/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,finikorg/zephyr,kraj/zephyr,ldts/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,finikorg/zephyr,kraj/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,ldts/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,GiulianoFranchetto/zephyr,kraj/zephyr,Vudentz/zephyr,punitvara/zephyr,ldts/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,finikorg/zephyr